Chewable Fedora Atomic

Fedora Atomic is an operating system targets to containers. However, the documentation, for me, is very hard to read. In this document, I will share my adventure with Fedora Atomic, starting with post installation.

I have installed Fedora Atomic, now what?

Let’s say you want to install the tree and docker-compose for better understanding the directory structure of your new host; you also need to ping a host every hour; and of course, you want your shiny new docker application to be deploy to this machine.

Package Install with rpm-ostree

Docker: dial unix /var/run/docker.sock: no such file or directory. Are you trying to connect to a TLS-enabled daemon without TLS?

When I run

docker images

on my newly setup docker in Fedora 21, it shows:

FATA[0000] Get http:///var/run/docker.sock/v1.16/version: dial unix /var/run/docker.sock: no such file or directory. Are you trying to connect to a TLS-enabled daemon without TLS?

The problem resolve after I re-login. So the error seems like that the permission is not yet applied, as I just add myself to docker group without logout.

So, if you cannot or don’t want logout just yet, use

sg docker "docker <subCommand> ..."

As long as you are in docker group in /etc/group, sg won’t ask you password.